Freeze-drying system

Abstract

The utility model discloses a freeze-drying system. The freeze-drying system comprises freeze-drying equipment, a refrigeration assembly and a control system, the freeze-drying equipment comprises a freeze-drying box, a refrigeration evaporator and a tray; the refrigeration assembly comprises a compressor, a condenser and a throttling device; the refrigeration evaporator penetrates through the freeze-drying equipment to be connected with the refrigeration assembly, and a refrigerant enters the refrigeration evaporator from an inlet of the refrigeration evaporator through the compressor, the condenser and the throttling device to be expanded, so that refrigeration is carried out; in the sublimation stage, the materials are heated in a low-temperature vacuum state, so that moisture in the materials is directly sublimated into a gas state from a solid state, and the moisture is condensed on a refrigeration evaporator after encountering a low-temperature evaporative condenser for supplementing ice; and the tray carries articles to be freeze-dried to enter the freeze-drying equipment for freeze-drying. According to the freeze-drying system, the refrigerating and ice supplementing efficiency is improved, the size of the freeze-drying box is reduced, and the freeze-drying system can be used for a small desktop freeze dryer.

Description

Technical Field

[0001] The utility model relates to a freeze drying system and belongs to the technical field of freeze dryers. Background Art

[0002] A freeze dryer utilizes the principle of sublimation to freeze water-containing substances at low temperatures, then removes the solid ice by sublimating it directly into gas under a vacuum. This equipment produces freeze-dried materials with minimal water content and the ability to rehydrate. Freeze drying enhances material stability, enabling long-term storage and preventing physical, chemical, and biological changes in the dried material.

[0003] The basic mechanical components of a freeze dryer consist of a drying chamber and a cold trap. In large freeze dryers, these two systems are connected by pipes. Moisture from the product within the drying chamber, at a certain temperature and under vacuum, precipitates and condenses on the cold trap through a connecting pipe, thereby freeze-drying the product. Existing freeze dryers integrate the drying chamber and cold trap to reduce the size of the freeze dryer and increase ice replenishment efficiency. However, these systems suffer from uneven cooling and low efficiency, and their overall size makes them unsuitable for small, desktop, or home applications.

[0004] Therefore, there is an urgent need for a freeze dryer with high refrigeration and ice replenishment efficiency and small overall volume to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing freeze dryer has uneven refrigeration, low ice replenishment and refrigeration efficiency, and is large in size and has limited usage scenarios.

[0006] In order to solve the above technical problems, the utility model provides a freeze-drying system, which is characterized by comprising a freeze-drying device, a refrigeration component and a control system;

[0007] The freeze-drying equipment includes a freeze-drying box, a tray and a refrigeration evaporator arranged inside the freeze-drying box; the refrigeration evaporator passes through the freeze-drying equipment and is connected to the refrigeration component, and the tray carries the items to be freeze-dried into the freeze-drying equipment for freeze-drying.

[0008] Furthermore, the freeze-drying equipment also includes a tray bracket, which is rectangular and located at the bottom of the box. It is mainly used to hold trays and can be taken out for cleaning; the trays are placed on the tray bracket.

[0009] Furthermore, the refrigeration assembly includes a compressor, a condenser and a throttling device, and the compressor, condenser and throttling device are connected in sequence to provide circulating cooling capacity for the freeze-drying equipment.

[0010] Furthermore, the freeze-drying equipment includes:

[0011] The refrigeration evaporator inlet is connected to the refrigeration evaporator at one end and to the throttling device at the other end;

[0012] Refrigeration evaporator outlet, one end is connected to the refrigeration evaporator, and the other end is connected to the compressor;

[0013] The circulating cooling energy obtained by the refrigeration component enters the refrigeration evaporator through the throttling device, and returns to the refrigeration component for recycling after the circulation is completed.

[0014] Furthermore, the freeze-drying equipment also includes an electric heating plate, which is located above and / or below the tray support frame to heat the material.

[0015] Furthermore, the freeze-drying equipment also includes a heat insulation plate, which is located above the heating plate. During the product drying process, the heat generated by the electric heating is isolated from being dissipated upward, thereby affecting ice replenishment.

[0016] Furthermore, the freeze-drying equipment also includes an electrical port located on one side of the freeze-drying chamber wall, and the control system is connected to the electrical port through an aviation plug, so as to read and control the temperature of the electric heating of the heating plate.

[0017] Furthermore, the freeze-drying equipment also includes a vacuum pump and a vacuum pipe port arranged on the wall of the freeze-drying box body. The vacuum pump is connected to the vacuum pipe port to evacuate the interior of the freeze-drying box body.

[0018] Furthermore, the freeze-drying equipment also includes a vacuum detection port located on one side of the freeze-drying chamber, which is used to connect an external vacuum gauge to detect the vacuum environment inside the freeze-drying chamber.

[0019] The freeze-drying system provided by the utility model has the following advantages:

[0020] The utility model designs an integrated structure of a freeze-drying box and a refrigeration evaporator, and sets the refrigeration evaporator inside the box. The internal refrigeration evaporator provides cold air during pre-freezing and replenishes ice during sublimation, thereby reducing the loss of cold air inside the box and increasing the efficiency of ice replenishment. In addition, the integrated structure effectively reduces the volume of the box and can be used for small desktop freeze dryers, etc., adding different usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the freeze-drying box structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the freeze-drying system of the utility model.

[0023] In the picture:

[0024] 1-tray; 2-tray support frame; 3-refrigeration evaporator; 4-freeze-drying chamber; 5-vacuum pipe port; 6-refrigeration evaporator inlet; 7-refrigeration evaporator outlet; 8-vacuum detection port; 9-electrical port; 10-electric heating plate; 11-insulation pad; 12-compressor; 13-condenser; 14-throttling device; 15-vacuum pump; 16-control system. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] like Figures 1 to 2 As shown, the embodiment of the present utility model provides a freeze-drying system, including a freeze-drying device, a refrigeration component and a control system;

[0027] The freeze-drying equipment includes freeze-drying box, refrigeration evaporator, vacuum pump, tray, tray support frame, electric heating plate, vacuum nozzle and other components;

[0028] The pallet support is a rectangular sheet metal bracket located at the bottom of the box. It is mainly used to hold pallets. It is a portable bracket that can be removed for cleaning. The pallet is placed inside the support and can also be removed from one end of the box to hold materials. Electric heating plates are located on the upper and lower sides of the pallet support to heat the materials.

[0029] The freeze-drying equipment also includes an insulation pad, which is located above the heating plate on the upper side of the tray support frame. During the product drying process, the insulation pad prevents the heat from the electric heating from radiating upward and affecting the ice replenishment.

[0030] The refrigeration evaporator is located above the tray support frame; the vacuum pipe port is located on the wall of the other end of the freeze-drying box;

[0031] The refrigeration assembly includes the compressor, condenser and throttling device;

[0032] The compressor, condenser, and throttling device are connected in sequence, passing through the evaporator inlet, with one end connected to the evaporator and the other to the throttling device. The refrigerant passes through the evaporator outlet, with one end connected to the evaporator and the other to the compressor. During the product pre-freezing stage, the refrigerant passes through the compressor, condenser, and throttling device, then enters the evaporator from the evaporator inlet for expansion, thereby refrigerating the product. The refrigerant then returns to the compressor through the evaporator outlet. During the sublimation stage, the material is heated under low-temperature vacuum conditions, causing the moisture in the material to sublime directly from solid to gas. Upon encountering the low-temperature evaporator, the moisture condenses on the evaporator, replenishing the ice.

[0033] The vacuum pump is connected to the vacuum pipe port to evacuate the inside of the freeze-drying box;

[0034] The freeze-drying equipment also includes a vacuum detection port located on one side of the box body, which is used to connect an external vacuum gauge to detect the vacuum environment inside the box body.

[0035] In some embodiments, the material is pushed into the tray, and the vacuum pump is connected to the vacuum pipe port to evacuate the entire container and provide a vacuum environment inside the box. The vacuum detection port on the side of the box wall is connected to a vacuum gauge to detect the vacuum environment inside the box. The refrigerant enters the refrigeration evaporator from the refrigeration evaporator inlet through the compressor, condenser, and throttling device to expand, thereby performing refrigeration, and then returns to the compressor through the refrigeration evaporator outlet; in the material freezing stage, the refrigeration evaporator provides cold energy to radiate downward to the material in the tray support frame for freezing; in the sublimation stage, since the vacuum pump evacuates the interior of the box, the freeze-drying box is in a vacuum environment, and the control system is connected to the electrical port through the aviation plug to read and control the temperature of the electric heating of the heating plate, thereby heating the upper and lower heating plates of the tray support frame, thereby heating the material, so that the moisture in the material is directly sublimated from solid to gas;

[0036] The gaseous water evaporates upward and encounters the low-temperature refrigeration evaporator, thereby condensing on its surface and replenishing ice; the insulation pad is located on the upper side of the tray support frame. During the product drying process, it isolates the heat from the electric heating from dissipating upward and affecting ice replenishment.

[0037] Therefore, the refrigeration evaporator is designed inside the freeze-drying chamber, which plays a refrigeration role in the material freezing stage and also plays an ice-replenishing role in the sublimation stage. This enhances its refrigeration and ice-replenishing efficiency and effectively reduces the overall volume of the freeze-drying chamber. It can be used in small desktop freeze dryers, increasing the use scenarios of the freeze-drying system.

[0038] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A freeze-drying system, characterized in that: Includes freeze drying equipment and refrigeration components and control systems; The freeze-drying equipment includes a freeze-drying box, a tray, and a refrigeration evaporator arranged inside the freeze-drying box; the refrigeration evaporator passes through the freeze-drying equipment and is connected to the refrigeration component, and the tray carries the items to be freeze-dried into the freeze-drying equipment for freeze-drying; The refrigeration assembly includes a compressor, a condenser and a throttling device, and the compressor, the condenser and the throttling device are connected in sequence to provide circulating cold capacity for the freeze-drying equipment; a refrigeration evaporator inlet, one end of which is connected to the refrigeration evaporator and the other end of which is connected to the throttling device; A refrigeration evaporator outlet, one end of which is connected to the refrigeration evaporator and the other end of which is connected to the compressor; The circulating cold energy obtained by the refrigeration component enters the refrigeration evaporator through the throttling device, and returns to the refrigeration component for recycling after the circulation is completed; The freeze-drying equipment also includes a tray support, which is rectangular and located at the bottom of the box, and the tray is placed on the tray support; the freeze-drying equipment also includes an electric heating plate, which is located above and / or below the tray support to heat the material; the freeze-drying equipment also includes an insulation plate, which is arranged below the refrigeration evaporator to isolate the heat from the electric heating from dissipating upward during the product drying process, thereby affecting ice replenishment.

2. A freeze-drying system according to claim 1, characterized in that: The freeze-drying equipment also includes an electrical port located on one side of the freeze-drying box wall. The control system is connected to the electrical port through an aviation plug, so as to read and control the temperature of the electric heating of the heating plate.

3. A freeze-drying system according to claim 2, characterized in that: The freeze-drying equipment further comprises a vacuum pump and a vacuum pipe port arranged on the wall of the freeze-drying box body. The vacuum pump is connected to the vacuum pipe port to evacuate the interior of the freeze-drying box body.

4. A freeze-drying system according to claim 3, characterized in that: The freeze-drying equipment further comprises a vacuum detection port located on one side of the freeze-drying chamber, which is used to connect an external vacuum gauge to detect the vacuum environment inside the freeze-drying chamber.

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